{"instruction": "You are an expert in named entity recognition. Please extract entities that match the schema definition from the input. Return an empty list if the entity type does not exist. Please respond in the format of a JSON string.", "schema": ["organization", "location", "person", "else"], "input": "U.N. officials said that a Kurdish rebel faction backed up by Iraqi tanks , heavy artillery and helicopters had taken control of half of the city after heavy fighting ."}
{"organization": ["U.N."], "location": [], "person": [], "else": ["Kurdish", "Iraqi"]}